Sign display apparatus

Claim 1

An assembly of individually illuminated signs, each sign comprising: an enclosure having a front opening; artificial light generating means mounted within the enclosure for generating artificial light; a display face affixed to the inclosure enclosing the front opening, said display face having a plurality of closely associated layers, including a transparent front layer; a thin intermediate layer consisting of developed photographic film negative having removed emulsions transparent areas and opaque emulsion areas defining the message; a milk-white translucent plastic layer behind the intermediate layer reflecting daylight passing through the transparent areas in one direction as a milk-white color; a clear transparent back layer positioned behind the milk-white translucent layer; and a colored translucent layer having a selected color other than the black or white interposed between the milk-white translucent layer and the clear transparent back layer overlying at least one of the transparent areas of the negative layer to transmit the artificial light through the transparent areas in the other direction with the light passing through the transparent areas in the other direction with the light passing through the overlaid transparent area having the selected color to provide a multicolor display when the artificial light is operated, and wherein two adjacent signs are interconnected together with a threaded bolt having two threaded ends in which one and extends through one enclosure and the other end extending through the other enclosure with nuts mounted on the bolts for securing the enclosures to the bolts at adjustable space intervals.